Facebook and Instagram have introduced cross-app messaging, letting users from one app find and message you on the other.
With cross-app messaging, you can now search for and message, video chat, or reshare posts with people across Instagram and Facebook.
You can still choose who can message you.
To decide where you receive message requests and who can contact you, head to Message Delivery Settings on Facebook.
However, your Active Status, when enabled, now works across Facebook and Instagram, so people on either platform can know when you are online.
It does not, however, impact who can see your Story posts on either platform.
You can learn more about cross-app messaging in the Facebook Help Center.